"When people say, “This is the language of my father,” ask them: “Are the worn-out shoes of your father still usable?” Every science is in need of new formulas. Likewise, the certain periods of life bring new expressions. One must rejoice at each new expression. Nothing is worse than the embrace of a corpse!... Seek renovation in all of life. 141."
January 1, 1970
https://en.wikiquote.org/wiki/Science_and_mysticism